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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56e6a00be5bdac49b82fd59ac55933fdb7ca51499f9f5d678d60a0ffd426f67b' 
  AND token = '8o0xmHIx/2QMnk/BSHL8DtS4f1p2VcRbGWp0Zd4OUew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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