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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01efda0f1092a434f4b739fdaa0b39ec4b928a8599e412720c55aef939907dc2' 
  AND token = 'JPBxTPj431+UGWmN0HAcHtGTpcSzEwRTl+GjSPAhtCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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