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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ba9abaa1b945cd076facc0a1ff260d925b3559e8499e8efca525a87cc6caf0b' 
  AND token = 'Ife1g//Hf73Lm4eVTpQkLBjmYXDsFMkEQ2cY1TGhJ24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}