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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '984b53738e119ee0062789ddc4dc403461da5de5a2f4c8a4f613735d87ff707b' 
  AND token = 'Fm+a4JkIcgJHIg47CElC9JmsCcYi8Sp90jPX/l3YmYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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