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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e3f96e17dad3edd1debb35639d5ef70213fd2a8f29dd3d44dbfbdd6f6c73d48' 
  AND token = 'YH+pOvaQ2cY5YVAdXlfsOH47p0UllwA7kgS1K3J64u4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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