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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de8d7b579be67953755100c0f89d2d74682e08314b7a46d6712c89cb58c91381' 
  AND token = 'lR8HWo+JDuRl4Nbhs3jsUo50hVnD97AYeM1/PilJfvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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