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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1dab1a3ff1a2c7258dfc114f046042dcd2170d1377cc65473200c02c5d3cc84c' 
  AND token = 'I0JTu4BmT0BqIv3r9KMofwkL4W6Ej+DtMvJcHyE6XDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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