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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12c26085f92420465ad58da072b7a553a734a268a861aa59860f0040a0bf88d5' 
  AND token = 'fMpAOSPzXxwjgJjQCu4c7d32e8Ij9h9dOmQSAKcfT4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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