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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e69f23e0b21001fb94aa8667bf0e026540263a6ffdfff9a4ded4fd6ba8c5a5a' 
  AND token = '+A1rk1xzH23MEARKXxYCp5WAarSCUrmDezFzKydg9g4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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