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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2caf69853e3477686f4f8240820db850acd8fb58e7bc8d74e623a0303ab45961' 
  AND token = 'BAXxi4KcaUl8CEfAwvH0PFz9qBS2Qw1NXxZ93Os2gZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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