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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2da5fcae16ad34caed6c5f1ed1664342f0c9f71ac4fc6695a16644c82b86bd8c' 
  AND token = 'fgvBLVgLCjiJxzgaGflkSPADO3S9/Hm/9tDMfRp08Ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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