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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ebb98a614bb13a7277b80a0bfa2f9f1a05c8d270107d4c468128f6dc0394ae2' 
  AND token = 'CDe5sdAj/dWWKAC0xSQ2noiEW7uOr+Wzke/Gfj96a4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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