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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4f2629e2f6d6369049ec759710b13bf7b8782ff804fb90afffd6f48a91fae58' 
  AND token = 'rjpN5+uPo+Fly2q56+YJkNBIRCtQg4ekE/T0Vx0JVAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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