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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30ada8f56c39c6f41d908579b38f9f15232c921f2e6acd8efe20769044126185' 
  AND token = 'DCo6t9ryyKQ9nVo+lVZ58SLnWOvqQ//nEX4o/X+a8Rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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