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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbeb1c1a22ba52dbb77d3b991459a69191f01c4f02b6fedb503d73f8ecbcf941' 
  AND token = 'OoxaAA26ldm+JYZe5BDN0AfqwPLL2tvKzTqmkVwj1fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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