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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aaddedfaad6cadefc6b0c5cbc65e9ab177044eb194ab2932e9a71c652f0a47f' 
  AND token = 'ahRy7tdVhXLzy89G3i1IQ5Ups1k5nWIuMrP74Lqq3ko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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