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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65e2e792aa1f036e01c3700ad0cfc8e8c88a8963edb6cacf1e11cd01dec16188' 
  AND token = '5n8svI7Ork8o4e6mU3X+RKyui9MRO8UJz6t7XhKpeAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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