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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b8116e5df6910e830fd43336abff1c794e5e40e9a790366aba1bc475ecc24d0' 
  AND token = 'sww6oz+uH5mynXvdH2qbGOuAADuasa9nxzQKS4f0w24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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