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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb445f0ce0a5e11a2ee03e126bc4fd309515f519474976a84d2fd9a636ffa7a2' 
  AND token = 'V4az87k7iauF0Tg1/HZFOjA8KIm7iSpNoRgs2dg3AW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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