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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cff8d5c37843728e609c1c0ce0bf537f22cf729380b23762a0b3e55e19e479b' 
  AND token = 'uduK6L7nD+kaJLzAoNkVenNNxnyyNJPM2ZR/mXZvvhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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