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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7339436bd18d32993833904c570d5382d568c59b9bf399939c46129836e7ab90' 
  AND token = 'FIau0O0Sf4d1h4G/zsy72s5qPIx/bK2hZ5DfIddza/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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