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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '879d27617ef342ac6b2a2e00539c14fd236e85464af0990b6c47dbea2962249c' 
  AND token = 'Q74fSF9cFZstTsW1/kUkQcNu6bRDiHXukcP/P7kSlTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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