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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '53db73da11c5dcbc49a547f89e2277a7a600a676ef52dacb3f765e36d770d6f3' 
  AND token = 'yyREu6Plq5mpko8gfn0Rfnq1jZPAm6eqxPrA5OP78w8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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