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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1288f245427cf32fa9276d0c41eefa4c68148f8674632a7467c97706235b54dd' 
  AND token = 'qf69fN6D0AqAZaFs3Cwfs1UsH15qtlsfuq7HgT8i02s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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