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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'badb1904e85a9edb0d4f33866f0369eb66ea1ecf787fc9b301d6cddfac49ad57' 
  AND token = 'Uxwpg74LArpFQiTqJadj+79kRm6fQBsTAZv4D//5kNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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