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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bbd7b072ead3855b7b6154875d62735fed25226057e25e887783447f22ea412' 
  AND token = 'XU1YjhfYHlm63bBgG6IT90ezfsr3TnFIrGGkizmIYbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}