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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5d6cb6a366a2adfc59944f33ddadc000c27608567d182fcded5e2df5d94fc7e' 
  AND token = 'hx1p6TGVzd+gT/HEACAXeXiRBQzEk2Xhw3K59iOY64c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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